Exhibit 1

	KPMG LLP Suite 900 8350 Broad Street McLean, VA 22102

Independent Accountants’ Agreed-Upon Procedures Report

Goldman Sachs Mortgage Company
(the “Loan Seller”)
GS Mortgage Securities Corporation II (the “Depositor” and together with the Loan Seller, the “Company”)
Goldman Sachs Bank USA
Goldman Sachs & Co. LLC
(collectively, the “Specified Parties”):

Re: GS Mortgage Securities Corporation Trust 2026-RCS – Data File Procedures

We have performed the procedures described below on the specified attributes in an electronic data file entitled “GSMS 2026-RCS Accounting File.xlsx” provided by the Loan Seller on July 24, 2026 (the “Data File”), containing information on one mortgage loan (the “Mortgage Loan”) and one related property (the “Property”) as of August 20, 2026 (the “Cut-off Date”), which we were informed is intended to be included as collateral in the offering by GS Mortgage Securities Corporation Trust 2026-RCS, Commercial Mortgage Pass-Through Certificates, Series 2026-RCS (the “Certificates”). The Loan Seller is responsible for the specified attributes identified by the Loan Seller in the Data File.

The Specified Parties have agreed to and acknowledged that the procedures performed are appropriate to meet the intended purpose of assisting the Specified Parties in evaluating the accuracy of the specified attributes in the Data File. This report may not be suitable for any other purpose. No other parties have agreed to or acknowledged the appropriateness of these procedures for the intended purpose or any other purpose.

The procedures performed may not address all the items of interest to a user of this report and may not meet the needs of all users of this report and, as such, users are responsible for determining whether the procedures performed are appropriate for their purposes. We make no representation regarding the appropriateness of the procedures either for the intended purpose or for any other purpose.

Unless otherwise stated, the following definitions have been adopted in presenting our procedures and findings:

Prior to being provided the Data File, we received one or more earlier versions of the data file on which to perform our procedures. In performing those procedures, we identified differences which were communicated to the Company. The Data File represents the revised information reflecting resolution of differences communicated as determined appropriate by the Loan Seller. We performed the procedures on the Data File, and the results of those procedures are reflected herein.

The procedures we were instructed by the Loan Seller to perform and the associated findings are as follows for the Mortgage Loan and Property included in the Data File:

We found such information to be in agreement without exception.

We were engaged by the Company to perform this agreed-upon procedures engagement. We conducted our engagement in accordance with attestation standards established by the American Institute of Certified Public Accountants, which involves us performing the specific procedures agreed to and acknowledged above and reporting on findings based on performing those procedures. We were not engaged to, and did not, conduct an examination or review, the objective of which would be the expression of an opinion or conclusion, respectively, on the specified attributes in the Data File. Accordingly, we do not express such an opinion or conclusion. Had we performed additional procedures, other matters might have come to our attention that would have been reported.

We are required to be independent of the Company and to meet our other ethical responsibilities, in accordance with the relevant ethical requirements related to our agreed-upon procedures engagement.

The procedures performed were applied based on the information included in the Data File and Provided Information, without verification or evaluation of such information by us; therefore, we express no opinion or any other form of assurance regarding (i) the reasonableness of the information provided to us by the Loan Seller,

(ii) the physical existence of the Mortgage Loan and related Property, (iii) the reliability or accuracy of the Provided Information which was used in our procedures, or (iv) matters of legal interpretation.

The procedures performed were not intended to address, nor did they address: (i) the conformity of the origination of the Mortgage Loan to stated underwriting or credit extension guidelines, standards, criteria or other requirements, (ii) the value of collateral securing the Mortgage Loan being securitized, (iii) the compliance of the originator of the Mortgage Loan with federal, state, and local laws and regulations, or (iv) any other factor or characteristic of the Mortgage Loan and related Property that would be material to the likelihood that the issuer of the Certificates will pay interest and principal in accordance with applicable terms and conditions. The procedures performed were not intended to satisfy any criteria for due diligence published by the nationally recognized statistical rating organizations (“NRSROs”).

The terms of our engagement are such that we have no responsibility to update this report because of events and circumstances that may subsequently occur.

This report is intended solely for the information and use of the Specified Parties. It is not intended to be and should not be used by any other person or entity, including investors or the NRSROs, who are not identified in the report as the Specified Parties but may have access to this report as required by law or regulation.

/s/ KPMG LLP

McLean, Virginia

July 24, 2026

COMPARED ATTRIBUTES

RECOMPUTED ATTRIBUTES